Title:Efficacy of Rituximab on Refractory Organ Involvements in
Granulomatosis with Polyangiitis: A Systematic Review of Case Reports
Volume: 20
Issue: 3
Author(s): Hamed Hajishah, Mohammad Javad Amini, Amir Shayan Chadeganipour, Seyyed Amirhossein Salehi and Danial Kazemi*
Affiliation:
- Student Research Committee, Isfahan University of
Medical Sciences, Hezar Jerib Street, Isfahan, Iran
Keywords:
ANCA, granulomatosis, polyangiitis, vasculitis, rituximab, AAV, rituxan.
Abstract:
Introduction: Granulomatosis with polyangiitis (GPA) is a type of Antineutrophil cytoplasmic
antibody (ANCA)-associated vasculitis (AAV) characterized by necrotizing vasculitis affecting
small and medium-sized blood vessels. GPA affects various organs, with respiratory tract,
vasculitis and glomerulonephritis being the most common triad. Remission induction and maintenance
therapy for GPA traditionally involves corticosteroids and cyclophosphamide. However,
treatment with rituximab, a monoclonal antibody that depletes B-cells involved in autoimmune disease,
has been successful in inducing remission in several studies. The purpose of this systematic
review was to investigate the efficacy of rituximab in treating various clinical manifestations of
GPA.
Methods: In adherence to PRISMA guidelines for systematic reviews and meta-analyses, we carried
out a comprehensive review to investigate the effectiveness of rituximab on particular organ
involvement in GPA. We searched three databases (PubMed, Scopus, and Embase) up until
November 6, 2022, for case reports on the topic. To ensure all relevant studies were included, we
manually screened the first 50 pages of Google Scholar's search results.
Results: The review identified a total of 64 case reports and a case series of 113 cases, highlighting
the effectiveness of rituximab in treating refractory organ involvement in GPA. The review also
analyzed the effectiveness of rituximab in treating ocular, CNS, cardiac, pulmonary, cutaneous,
gastrointestinal, renal, and other organ involvements in GPA.
Conclusions: Our results indicated that rituximab can be a promising therapy for treating specific
clinical manifestations of several organ involvements. However, more research is needed to determine
the long-term efficacy of rituximab in treating GPA.